Aggregate current transformer
US5576921A · kind A · utility
1Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Jul 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H83/144
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sum current transformer that acts on a protective switch via an amplifier has a core of a solid metallic material composed of an alloy having more than 40% nickel, so that it can be implemented mechanically solid even given small dimensions. The temperature dependency of the arrangement caused by the ohmic resistance of the winding is compensated by the diminishing eddy currents in the core given increasing temperature, so that the smallest dimensions can be realized for the aggregate current transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.